Tobacco-pipe reamer



June 2, 1942. P. A. SHOUDY 2,284,924

TOBACCO P IPE REAMER Filed Nov. 18, 1940 INVENTOR Pa N /2 cu 01y E g ,WE, 5*

ATTORNEY Patented June 2, 1942 oirso' STATES he fr "Terms TOBACCO-PIPEREAMER Paul A. Shandy, Seattle, Wash, assignor to Kir} v ,sten PipeCompany, Seattle, Wash., a corporation of Washington ApplicationNovember 18,1940, Serial Nb. 366,040

4 Claims.

cake crust with the resultant cracking. of the cake which has been theobjection to practically if not all tobacco-pipe reamers heretoforeavailable.

It is a further and a particular object to devise a reaming tool havingan open center and which is self-clearing in action.

It is a further and a particular object still to devise a reaming toolfor tobacco-bowl use of such form and nature as to permit the same to beproduced inexpensively and in consequence sold at a low figure.

Other objects and advantages, with the foregoing, will appear in thecourse of the following detailed description and claims, the inventionconsisting in certain novel features of construction and in thearrangement of parts illustrated in the accompanying drawing andhereinafter described and claimed.

In said drawing:

Figure 1 is a top plan view of a tobacco-bowl reamer embodying thefeatures of the present invention.

Fig. 2 is a side elevation thereof.

Fig. 3 is also a side elevational View of the reamer modified in thatthe same is given an approximate 60 twist and shown in its applicationto the bowl of a Kirsten-type pipe; and

Fig. 4 is a horizontal section taken to an enlarged scale on line 4-4 ofFig. 3, the view being somewhat diagrammatic to show the working of thetool.

Having reference to said drawing it will be seen that the reamer isproduced from a blank of sheet metal suitably die-cut and turned about ashaping mandrel to the general form of a truncated cone modified in thatthe two ends 56 of the blank each recede inwardly somewhat from a trueconcentric. It is of course apparent that the blank might as well bedie-cutand turned to the suggestion of a paraboloid in such in-,

stances as the same is produced for use with pipes having curved ratherthan the illustrated angle of approximately 45 and this deflected lip,denoted by 5', acts as the reaming edge of the device. Such lip isdesirably paralleled by the trailing edge l5 of the tool, from which thesame is spaced to define a clearing throat therebetween, and ischaracterized in that the same develops a shear-scrape as the tool isgiven a twist by the application of finger pressure, this shear beingobtained through the instrumentality of locating the lip on a linedescribing a receding steep helix.

noting particularly the diagrammatic showing of Fig. 4 from which it isseen that the tool presents a smooth bearing face at a pointdiametrically opposite the scraping lip 5'. It is the provision of sucha bearing face characterized by the absence of any obstruction to a freeriding travel over the surface of the cake, conjunctivelywith theshear-developing helix of the reaming lip, and the complementingexpedient of producing a reaming twist through the application of atangential force working to the immediate rear of the lip which isresponsible for the extreme ease with which the tool may be used todress out a tobacco chamber. Also acting to further the emciency of thereamer is the fact of the sheet metal from which the blank for thereamer is stampedproviding such a resiliency in the produced tool as topermit the reaming lip to yield slightly upon contacting a particularlyhard portion of carbon cake, and in consequence preclude the developmentof the expansive pressure condition which, in non-yielding reamers,results not only in an objectionable cracking of the cake but in manyinstances of the bowl itself. It should be considered, however, thateach such feature or a functional counterpart Very probably might findindependent utility, and it is to be therefore and with the ends of saidbody which lie at opposite sides of said slot extending inwardly from atrue concentric and terminating in spaced relation to define a clearthroat therebetween, the terminal edge of one of said ends occupying theline of a steep helix, and a reaming lip extending outwardly from saidterminal edge.

2. A tobacco-pipe reamer according to claim 1 having an upwardlyextending integral ear which, to receive the fingers of the operator inimparting a reaming twist, is disposed approximately tangent to thereamer proper in immediate following relation to the lip.

3. A reamer for a tobacco-pipe comprising a sheet metal body of a shapeperipherally resembling a truncated cone and having a longitudinal boreand a longitudinal slot, and with the ends of said body which lie atopposite sides of said slot extending inwardly from a true concentricand terminating in spaced relation to define a clear throattherebetween, the terminal edge of one of said. ends occupying the lineof a steep helix, and'a reaming lip extending outwardly from saidterminal edge.

4. A reamer for a tobacco-pipe comprising a sheet metal body of a shapeperipherally corresponding to the chamber of a pipe bowl and having alongitudinal bore and a longitudinal slot, and with theends of said bodywhich lie at op- V posite sides of said slot terminating in spacedrelation to define a clear throat from the lower to the upper limits ofthe reamer, one of said ends extending inwardly from a, true concentricPAUL A. SHOUDY.

